National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Monticello, Sullivan County International Airport (KMSV)

Lat: 41.7°NLon: 74.8°WElev: 1404ft.

Mostly Cloudy

76°F

24°C

Humidity 48%
Wind Speed NW 7 mph
Barometer 30.24 in (1023.5 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 15 Aug 12:56 pm EDT
Extended Forecast for

Mongaup Valley NY

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 81. Northwest wind 3 to 5 mph.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 54. Calm wind.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: Showers likely, mainly after 3pm. Mostly cloudy, with a high near 77. Calm wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 77 °F

    Partly Sunny
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Showers. Low around 60. South wind around 6 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 60 °F

    Showers

  • Monday

    Monday: Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 80. Calm wind becoming northwest 5 to 7 mph in the afternoon. Chance of precipitation is 60%.

    High: 80 °F

    Showers
    Likely then
    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 57. Chance of precipitation is 30%.

    Low: 57 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 81. Northwest wind 3 to 5 mph.
Tonight
Mostly clear, with a low around 54. Calm wind.
Sunday
Showers likely, mainly after 3pm. Mostly cloudy, with a high near 77. Calm wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Showers. Low around 60. South wind around 6 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 80. Calm wind becoming northwest 5 to 7 mph in the afternoon. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 57. Chance of precipitation is 30%.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Sunny, with a high near 82.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.
Thursday
A chance of showers. Partly sunny, with a high near 79. Chance of precipitation is 40%.
Thursday Night
A chance of showers. Partly cloudy, with a low around 53. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mongaup Valley NY
 41.67°N 74.79°W (Elev. 1175 ft)
Last Update:
1:05 pm EDT Aug 15, 2026
Forecast Valid:
1pm EDT Aug 15, 2026-6pm EDT Aug 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation